Six-wheel truck



April 28, 1925. 1,535,413 I W. C. HEDGCOCK SIX-WHEEL TRUCK Y Filed Jan. 31, 1924 2 shets-sheet 1 Patented Apr, 255, 1925,

UNITED STATES 1,5i35,413 PATENT OFFICE.

WILLIAM C. HEDGGO'CK, OF CHICAGO, ILLINOIS, ASSIGNOR TO AMERICAN STEEL roulvnnrns, or CHICAGO, ILLINOIS,

A CORPORATION 013 NEW JERSEY.

SIX-WHEEL TRUCK.

Application filed January 31, 1924. Serial No. 689,611.

'1 '0 all whom it may concern:

Be it known that I, WILLIAM C. HunccooK, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Six-Wheel Trucks, of which the following is a specification.

This invention relates to six wheel trucks for railway cars and is an improvement over the arrangement disclosed in my coepending application, Serial Number 671,143, filed October 27, 1923.

One object of the invention is to provide a six wheel truck which is relatively light and durable in construction and which is flexible to facilitate the taking of horizontal curves and vertical curves, the latter of which are encountered particularly in passing to and from coal tipples at tidewater.

Another object is to provide a simple, efficient and flexible six wheel equalizing truck adapted to meet the various requirements under service conditions.

These and other objects are accomplished by means of the arrangement disclosed on the accompanying sheets of drawings, in which Figure 1 is a fragmentary top plan view of a six wheel truck embodying my invention;

Figure 2 a side elevation of the same;

Figure 3 is a detached side elevationof the side frame equalizing bar;

Figure 4 is a side elevation of one of the side frame members;

Figure 5 is a side elevation of the asso ciated side frame members on the same side of the truck;

Figure 6 is a fragmentary sectional view taken in. the plane of line 66 of Figure 1; and

Figure 7 is a fragmentary sectional view taken in the plane of line 7-7 of Figure 1.

The various novel features of the invention will be apparent from the following description and drawings, and will be particularly pointed out in the appended claims.

Referring to the figures of the drawings, it will be noted that my invention isillustrated in connection with a six wheel truck, each sideframe of which includes two operatively associated side frame members 10 and 11 in longitudinal alignment. For the sole purpose of distinguishing the side frame members 10 and 11, the side frame member 10 may be called a rigid or relatively rigid side frame member and the side frame member 11 a trailing side frame member. The rigid side frame member 10 has secured to it, in any suitable manner, an outer journal box 12 and an intermediate journal box 13. The trailing side frame member 11 has se-' cured to it, in any suitable manner, another journal box 14. Each of the side frame members 10 and 11 has a bolster opening 15 in which suitable load carrying springs 16 are located, said springs being mounted upon spring seats 17 formed on said side frame members. Transverse bolster members 18 which rest upon the springs 16 are guidably supported within said bolster openings l5. 7

Different types of bolsters may be used, but I prefer to use a three piece bolster such as that shown in the Lamont Patent No. 1,377,706, granted May 10, 1921, in which an equalizing bolster unit 19 has end girder members 20 rockably mounted upon the transverse bolster members 18. In this arrangement the truck center plate 21 is 'located directly over the middle axle 22, and the end axles 23 and 241 are spaced equal dis tances from the middle axle 22.

It will be noted that the side frame members 10 and 11 are not directlyconnected to each other, but are operatively connected to each other through or by an equalizing beam 25. The right hand end of this equalizing beam has a bearing surface which rests on top of the trailing side frame member 11 at a point 26 directly over the associated bolster member 18 or at apoint equi-distant between the middle axle 22 and one of the outside axles 2 1. Similarly, the opposite end of the equalizing beam 25 terminates directly over the other bolster member 18 and at a point equi-distant between the intermediate axle 22 and the other outside axle 23.

In this particular arrangement the left hand end of the equalizing beam 25 is forked or bifurcated to straddle the side frame member 10 and bears directly on a rocker casting 27 which in turn restson theendportion of the associated transverse bolster member 18. The rocker or casting 27 has its undersurfaces 28 curved convexly longitudinally of itself and of the transverse bolster member so that it may freely rock longitudinally of the transverse bolster .uieml'ier 18 and trans verselv with respect to the side frame to facilitate operating over irregular tracks and taking longitudinal curves and to compensate for relative twisting action between the side frame members, equalizing beam and bolster members 18. The under part of the rocker member 27 is provided with a dowel pin 29 which extends into a corresponding opening in the bolster member 18 to maintain the rocker member in proper position on the bolster and also for facilitat ng the taking of horizontal curves.

The depending side portions 30 of the bifurcated end of the equalizing beam 25 terminate in lower convex faces 31 which engage the top of the associated rocker member 27 to facilitate the taking of vertical curves or curves resulting from a vertical rise or fall of the tracks.

As a result of the cooperative action between the rocker members 27 with their longitudinally arranged convex surfaces and dowel pin 29., and with the convex surfaces of the bifurcated end of the equalizing beam 25 which rock on the rocker member 27, an arrangement is provided which is sufficiently flexible to be universal in action. In operating over vertical curves encountered in the usual coal tipples, which curves have a radius of approxin'iately 375 feet, there is a perceptible angularity in the side frames relative to each other with a resultant tendency to divert the vertical center lines of the transverse bolster members 18 from a parallel. positionand also to twist the bolster members within the bolster openings of the side frame members. 'lowever, with the flexible arrangement herein provided this tendency is overcome.

Also by virtue of the curved surfaces, 31 and 28 there is always a two line rolling contact at right angles with respect to each other, one between the surfaces 31 and the top of rocker member 27 and the other between the curved surface 28 of the rocker member and the associated transverse bolster member 18, which provides for a normal transfer of the load between the equalizing beam 25 and the bolster member 18 regardless of any twisting action by the side fran'ie members and 11 due to irregularities of the track.

As indicated above, instead of the trailing side frame member 11 being directly connected to the side frame member 10, it is directly connected to the middle point of the equalizing beam 25. In this connection it will be seen that the trailing side frame member 11 has a projecting arm 32 having an opening 33 which is made to register with openings 34. in the side flanges 85 of the equalizing beam for the reception of a bolt 36, and also a limited clearance for lateral movement of the equalizing beam relative to the side frame D'IGH'Il'JGlS 10 and 11. The equalizing beam 25 and the trailing side frame member 11 are shown and preferably made as two members connected by the bolt 36 to facilitate manufacture, but they may be combined into one integral member if desired.

lVhile the side flanges of the equalizing beam 25 embrace a portion of the arm 32 of the side frame member 11, the depending bifurcated or flange portions 30 of the left hand end of the equalizing beam 25 are embraced or guidedly held between upstanding outer flanges 37 formed on the rocker members 27.

In this design, the side frame members 10 and 11 are tied together solely by means of the bolster arrangement including transverse bolsters 18 which extend through the associated openings in said side frame members and by the longitudinally extending bolster unit including the girder members 20 which have saddle portions 38 which straddle the transverse bolster members 18. Accordingly, all longitudinal shocks between the side frame members 10 and 11 are taken by the bolster members 18 and their column guides. Proper clearances are allowed to permit of the necessary flexibility between the bolster members 18 and their column guides.

Also in this particular design, the method of equalizing or distributing the load to the different axles is substantially the same as disclosed in my said co-pending application, with the exception, however, that the load transmitted from the equalizing side frame member 11 and which ultimately is passed on to the left hand axle 23 and intermediate axle 22, is transn'iitted through the group of springs 16 instead of through the side frame member 10. In View of this fact the spring capacity required in connection with the side frame member 10 is increased. For this reason a grouping of four coiled springs 16 is provided in connection with side frame member 10, while a grouping of three springs 16 is provided for side frame member 11.

By means of this arrangement the flexibility of the truck is greatly increased and a combination of cooperating parts provided adapted to meet the various requirements under actual service conditions.

l t is my intention to cover all niodiih-a tions of the invention falling within the spirit and scope of the following claims.

I claim:

1. Inv a six wheel truck, the combination of a side frame including two associated side frame members, bolster members forming the sole connection between said side frame members, and a load equalizing member conneeted to one of said side frame members and transmitting a lead through the bolster A nm 2s, 19.

1,535,414 A. HOLLANDER DEEP WELL PUMP HEAD Filed March 27, 1924 2 Sheets-Sheet 1 I N V EN TOR.

ATTORNEY. 

